From GridLAB-D Wiki
deltamode_timestep - Control the fixed timestep of the delta mode
Synopsis
#set deltamode_timestep=10 ms
Remarks
The deltamode_timestep is used to control the timestep of delta mode operation of the simulation.
Version
This capability is introduced in Grizzly (Version 2.3).
The ability to use unit values (e.g., 10 ms instead of 10000000) was introduced in Navajo (Version 4.3).